I've always had a double oven at home, but I'm visiting my sister and
she's only got one oven.

So I want to make a roast for dinner, with roasted potatoes. The roast
has to cook at 375 for about an hour, and the potatoes need to
roast/bake (whatever you want to call it) at 450 for about 45 min to 1
hour (to get them nice and crispy)

Here's my dilemma. If I cook the roast first and then the potatoes,
the roast will be cold by the time the potatoes are done. And if I
make the potatoes first, same problem.

I've never understood this - how do you do it if you have just one
oven?

Cathy